Convert MKV to MP3
Free, fast and secure — convert MKV to MP3 right in your browser.
Pull the audio out of your MKV as MP3
Converting MKV to MP3 extracts a clean audio track from your video, giving you a compact MP3 audio you can play, share or add to a playlist without the video.
How to convert MKV to MP3
- 1 Drop your MKV file into the converter above.
- 2 It is converted to MP3 automatically — no settings to fiddle with.
- 3 Download your new MP3 file instantly.
MKV vs MP3
| Feature | MKV | MP3 |
|---|---|---|
| Compression | Lossy | Lossy |
| Transparency | No | No |
| Animation | Yes | No |
| MIME type | video/x-matroska | audio/mpeg |
| Best for | Archiving high-quality video with multiple tracks — converted to MP4 for everyday playback. | Music, podcasts and voice that need to play everywhere at a small size. |
About the formats
Matroska video
MKV (Matroska) is a flexible open container that can bundle many video, audio and subtitle tracks in one file. It is popular for high-quality archives and media libraries.
Strengths
- Holds multiple audio/subtitle tracks
- Open and future-proof
- Great for high-quality storage
Limitations
- Not supported on many phones/browsers
- Often needs converting to play
- Larger than streaming formats
Best for: Archiving high-quality video with multiple tracks — converted to MP4 for everyday playback.
MP3 audio
MP3 is the world’s most compatible audio format. Its lossy compression makes small files that play on every device and app, which is why it is still the default for music and podcasts.
Strengths
- Plays on virtually everything
- Small, convenient files
- Adjustable bitrate
Limitations
- Lossy — discards some audio detail
- Not ideal for archiving
- No lossless option
Best for: Music, podcasts and voice that need to play everywhere at a small size.